What is CVE-2025-43331?

CVE-2025-43331 is a medium-severity vulnerability in Apple macOS, classified under Missing Authorization. CVSS score: 4.0/10. Published 2025-09-15.

How severe is CVE-2025-43331?

Medium severity. CVSS v3 base score is 4.0 out of 10.

Auth bypass in Apple macOS

CVE-2025-43331

A downgrade issue was addressed with additional code-signing restrictions. This issue is fixed in macOS Tahoe 26. An app may be able to access protected user data.

Vulnerability class: Broken Access Control

Published 2025-09-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.0 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (7.8th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 7.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Apple macOS — versions 0

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

support.apple.com/en-us/125110 (Release Notes, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2025-43331?: CVE-2025-43331 is a medium-severity vulnerability in Apple macOS, classified under Missing Authorization. CVSS score: 4.0/10. Published 2025-09-15.
How severe is CVE-2025-43331?: Medium severity. CVSS v3 base score is 4.0 out of 10.